On my return flight to the US of A, I made a stop in NYC. I went via Newark airport. From previous experience I knew that the NJT rail line into Manhattan was a convenient one. But had I not known that from before, I would have ended up seeing buses as my only option to get to NYC.
The reason for that is because at the exit of Newark International, where you see the sign for 'Ground Transportation' the arrow points to the right - THE EXACT OPPOSITE DIRECTION of the rail line station to Manhattan which has no sign at that juncture. The bus ride costs $5 more than the train and is far less comfortable. Does NJ Transit know people get funneled away to the private bus and limo services like that?
[Update: Looking at the generic comments that this post collected, there is obviously money to be made by hiding the comfort of NJ Transit's smooth rail ride straight into Penn Station and duping people into paying more for a bumpy bus ride.]